6981808741 has 8 divisors (see below), whose sum is σ = 7107172344. Its totient is φ = 6856797120.

The previous prime is 6981808699. The next prime is 6981808787. The reversal of 6981808741 is 1478081896.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 134908225 + 6846900516 = 11615^2 + 82746^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6981808741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981808241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47806 + ... + 127471.

It is an arithmetic number, because the mean of its divisors is an integer number (888396543).

Almost surely, 2^6981808741 is an apocalyptic number.

6981808741 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6981808741 is a deficient number, since it is larger than the sum of its proper divisors (125363603).

6981808741 is a wasteful number, since it uses less digits than its factorization.

6981808741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175991.

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 6981808741 is about 83557.2183656206. The cubic root of 6981808741 is about 1911.2726677954.

The spelling of 6981808741 in words is "six billion, nine hundred eighty-one million, eight hundred eight thousand, seven hundred forty-one".